210423400011 has 12 divisors (see below), whose sum is σ = 331576266840. Its totient is φ = 127529333280.

The previous prime is 210423400007. The next prime is 210423400027. The reversal of 210423400011 is 110004324012.

210423400011 is a `hidden beast` number, since 210 + 42 + 3 + 400 + 0 + 11 = 666.

It is not a de Polignac number, because 210423400011 - 2² = 210423400007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210423400111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1062744346 + ... + 1062744543.

It is an arithmetic number, because the mean of its divisors is an integer number (27631355570).

Almost surely, 2^210423400011 is an apocalyptic number.

210423400011 is a deficient number, since it is larger than the sum of its proper divisors (121152866829).

210423400011 is a wasteful number, since it uses less digits than its factorization.

210423400011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125488906 (or 2125488903 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 210423400011 its reverse (110004324012), we get a palindrome (320427724023).

The spelling of 210423400011 in words is "two hundred ten billion, four hundred twenty-three million, four hundred thousand, eleven".